Bought my 2005 Titan xe used 2 years ago and about to make it my daily driver so trying to fix it up a bit more. Well the speedometer shows 81mph at an actual 77, 45mph shows about a 47 and it tapers off at lower speeds. The truck is running not quite stock size tires, but damn near identical circumference. So what I'm looking for is some advice on what the problem could be. Ive confirmed it's racking up the odometer as well which won't be great when I need to resell it.